This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 郘 is uncertain. It visually combines 吕 and ⻏, but the original meaning and component function are unclear.
With no clear meaning, picture the left side 吕 as two mouths and the right side ⻏ as a village. Perhaps it once named a place where people spoke, but the story is lost.
For リョ, imagine a lost village named Ryo, where the two mouths (吕) whisper the name Ryo (リョ) beside the village marker (⻏).